Gun



June 12, 1928.

6. M. M CANN Patented June 12, 1928.

GEORGE M. MGCANN, OF NEW CASTLE, DELAWARE.

GUN. j

Application filed October 6, 1926. Serial No. 139,937.-

(GRANTED UNDER THE PROVISIONS OF THE ACT OF MARCH 3, 1883, ZQ'STAT. L, 625.)

The invention described herein may be manufactured and used by or for the Government for governmental purposes, Without the payment to me of any royalty thereon.

The subject of this invention is a gun.

In those types of guns designed especially to accompany infantry or for use in mountainous country, the various elements of the gun must be susceptible of rapid dismantling and assembly to permit of extreme mobility and strategic employment. A gun of this character to be of maximum usefulness, must be divisible into loads convenient for individual transportation by hand and for distribution on a pack saddle.

In a gun of 75 m/m caliber the Weightof the barrel is'such as to render necessary its division. Accordingly this invention proposes to form the breech and the tube as separate elements and includes novel means for uniting them in assembly.

NVith the foregoing and other objects'in view, my invention resides in the novel arrangement and combination of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed may be made within the scope of what is claimed without departing from the spirit of the invention.

A practical embodiment of the invention is illustrated in the accompanying drawing wherein:

Fig. 1 is a plan view of the assembled gun mounted on its sleigh;

Fig. 2 is a similar view showing the tube disconnected from the breech Fig. 3 is a front elevation of the breech;

Fig. 4c is a rear elevation of the tube; and

one of the cam guides.-

Referring to the drawings by numerals of reference;

There is shown a .sleigh 5 which is mounted on the cradle 6 to reciprocate during recoil and counter recoil of the gun.

The gun which is fixed to the sleigh is formed in two units, one consisting of the breech 7 and the other of the tube 8. These members are provided on adjoining ends with interru g'ted threads, respectively 7 and 8 which when engaged lock the parts securely together.

Fig. 5 is a detail sectional view showing For the purpose of assisting in guiding the barrel in place and indicating when it is to be rotated, the barrel is provided with a pair of studs .99 adapted to enter cam grooves 10 10 formed in longitudinally extending projections 11 on the breech. The studs 011 engaging the curved surface 12 of the cam grooves are moved to the right thus indicating to the operator that the threads are in mesh and'enabling him to rapidly complete the coupling Without danger of injuring the threads. When the threads are in full engagement a lug 13 on the tube engages one of the projections 11.

The breech is provided at each side wit-h ribs 14 which enter vertical guideways 15 in i the sleigh so that the task of removing the breech may be performed without inconvenience.

In assembling the gun the breech is lowered into the cradle. By means of lifting handles 16, the tube may be guided to facilitate entry of the studs into the cam grooves.

Iclaim:

place and the tube then placed in 1. A gun comprising a breech member and a tube member, said members provided with interrupted threads whereby they may be coupled together, a pair of longitudinally extending projections on the breech member, each provided with a cam groove, and a pair of studs on the tube adapted to enter the cam groove and initiate rotation of the tube.

2. A gun comprising abreech member and a tube member, said member provided with cooperating locking means, the breech I member provided with cam grooves, and studs on the tube adapted to enter the cam grooves and initiate locking movement- 3. A gun comprising a breech member and a tube member, said members provided with cooperating locking means, andv fixed cooperating means on said members for initiating the locking movement.

4. A cradle, a sleigh reciprocally mounted thereon and provided with vertical guideways, a gun carried by the sleigh and com- .prising separable breech and tube members,

the breech member provided with ribs, receivable in the guideways of the sleigh.

GEORGE M. MoGANN. 

